Morelli Andrea, Ertmer Christian, Singer Mervyn
Department of Anesthesiology and Intensive Care, University of Rome, "La Sapienza," Rome, Italy.
Department of Anesthesiology, Intensive Care, and Pain Medicine, University of Muenster, Muenster, Germany.
JAMA. 2014 Feb 19;311(7):737-8. doi: 10.1001/jama.2014.327.